A full-automatic system for detecting size of parts

Abstract

The utility model relates to motorcycle, automobile parts detection field, and it is a kind of parts size full-automatic detection system, including feeding device, feeding cylinder, workpiece robot and detection unit assembly;Feeding device moves along guide rail under the drive of feeding cylinder;After workpiece robot grabs the part to be measured from feeding device, it is placed in detection unit assembly and carries out all-around detection;Detection unit assembly includes the workpiece positioning plate being equipped with recess position and threaded cylinder, and a pair of top block chuck head with semicircular cross section is equipped on recess position, and it is matched with the first pin, second pin of part to be measured;The output end of threaded cylinder is equipped with the top block chuck head being matched with the cylindrical end surface of part to be measured.The utility model uses the workpiece positioning plate being matched with the pin of workpiece itself, and it is fixed position to workpiece by threaded cylinder, and the round edge of workpiece can be positioned conveniently and accurately, and accurate measurement is carried out.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle and automobile parts inspection, specifically a fully automatic parts size inspection system. Background Technology

[0002] Engine camshaft brackets are crucial components in motorcycles and automobiles, requiring rigorous testing during actual production. For example, when inspecting the 2WF support bracket for 14 Honda Fit models, relevant dimensions (flatness, thickness, pin height, and hole diameter) need to be measured, and qualified products are marked with a date. The inspection standard typically sets the workpiece tolerance range at ±0.01mm, while the repeatability of the equipment must be at least ±0.004mm.

[0003] In the traditional inspection process of engine camshaft brackets, it is generally not difficult to manually locate the round edge of the part for static measurement using a vision-assisted system; however, it is quite difficult to automatically locate the round edge to be measured through an auxiliary system during a dynamic movement. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a fully automatic part size detection system. It adopts a workpiece positioning plate that cooperates with the workpiece's own pins, and uses a threaded cylinder to fix the workpiece in place. This system can conveniently and accurately position the round edge of the workpiece for precise measurement.

[0005] The fully automatic part size detection system in this embodiment of the invention includes a feeding device, a feeding cylinder, a workpiece robot, and a detection unit assembly. The feeding device is located on both sides of the workpiece robot and moves along the guide rail under the drive of the feeding cylinder. The detection unit assembly is located in front of the industrial robot. After the workpiece robot picks up the part to be tested from the feeding device, it places it on the detection unit assembly, and the detection unit assembly performs all-round detection of the size of the part to be tested. The part to be tested has cylindrical end faces at both ends, and a first pin and a second pin in the shape of cylinders are provided on the part to be tested; The detection unit assembly includes a workpiece positioning plate, which has at least one groove station for embedding the part to be tested. A pair of top block chucks are provided on the groove station, each with a semi-circular cross-section matching the diameters of the first and second pins of the part to be tested. The workpiece positioning plate also has a threaded cylinder, the output end of which has a top block chuck matching the cylindrical end face of the part to be tested. When the part to be tested is embedded in the groove station, the pair of top block chucks on the groove station clamp the first and second pins respectively. After the threaded cylinder is activated, it presses against the cylindrical end face of the part to be tested through the top block chuck at its output end.

[0006] Preferably, the detection unit assembly also includes an infrared scanner and an industrial camera fixed on the side plate, as well as a ball screw sub-module connected to the workpiece positioning plate, one end of which is equipped with a servo motor; Driven by a servo motor, the ball screw assembly moves the workpiece positioning plate horizontally, thereby moving the part to be tested, which is fixed on the workpiece positioning plate, horizontally to the detection area of ​​the industrial camera or infrared scanner.

[0007] Preferably, the feeding cylinder is a magnetically coupled rodless cylinder.

[0008] Compared with the prior art, the technical effects achieved by this utility model include: 1. This utility model adopts a workpiece positioning plate that cooperates with the workpiece's own pin, and fixes the workpiece in place by means of a threaded cylinder, which can conveniently and accurately position the round edge of the workpiece and perform precise measurement.

[0009] 2. This utility model uses a laser screen to scan the surface of the workpiece for non-contact measurement, collecting the height values ​​of each plane; then it compares the data contours of each plane of the workpiece, measures the pin height, workpiece thickness and shape, and automatically marks qualified products with dates and sorts good and defective products.

[0010] 3. The fully automatic detection system of this utility model adopts an overall moving scanning method. The entire plane measurement is a non-contact measurement, which can simultaneously detect the deformation and contour of the entire part. The robot positioning accuracy is ±0.01mm, the flatness dynamic full scan detection repeatability is <±1.5um, the part thickness repeatability is <5um, the pin height measurement accuracy is <5um, and the round hole diameter measurement repeatability is ±1um (measurement calibration part). Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the engine cam support to be tested in an embodiment of this utility model; Figure 2 This is a schematic diagram of the fully automatic part size detection system in the embodiments of this utility model; Figure 3 This is a schematic diagram of the detection unit component; Figure 4 This is a schematic diagram of the structure before the workpiece positioning plate and the part to be measured are fixed. Figure 5 This is a schematic diagram of the structure after the workpiece positioning plate and the part to be tested are fixed. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto. Example

[0013] This embodiment uses an engine camshaft bracket as an example to provide a more detailed description of a fully automated part size detection system. For example... Figure 1 As shown, the inspection of the engine cam support (i.e., the 2WF support, which is the part to be tested) requires measuring the diameter of the round holes of the first pin 101 and the second pin 102 and the distance between them. It also requires measuring the flatness of the upper surface 103 and the lower surface 104 of the workpiece, as well as the pin height and the workpiece height 104 (i.e., the product thickness).

[0014] like Figure 2 As shown, the fully automatic part size inspection system of this embodiment includes a feeding device 2, a magnetically coupled rodless cylinder 1, a workpiece robot 3, an inspection unit assembly 5, and a laser marking machine 6. The feeding device 2 is located on both sides of the workpiece robot and moves along a guide rail under the drive of the magnetically coupled rodless cylinder 1. The inspection unit assembly 5 is positioned in front of the industrial robot. After the workpiece robot picks up the part to be inspected from the feeding device, it places it in the inspection unit assembly. The inspection unit assembly performs a comprehensive inspection of the dimensions of the part to be inspected, and then the laser marking machine marks the qualified parts.

[0015] The structure of the detection unit component 5 is as follows: Figure 3 As shown, the assembly includes a workpiece positioning plate 53 and a ball screw sub-module 52 connected to each other. One end of the ball screw sub-module is equipped with a servo motor 51, and the workpiece positioning plate is equipped with a threaded cylinder 57 for fixing the part to be tested 54. The detection unit assembly also includes an infrared scanner 56 and an industrial camera 55 fixed to the side plate. Driven by the servo motor, the ball screw sub-module moves the workpiece positioning plate horizontally, thereby moving the part to be tested, fixed to the workpiece positioning plate, horizontally to the detection area of ​​the industrial camera and infrared scanner.

[0016] like Figure 4 As shown, the workpiece positioning plate 53 has at least one recessed station 531, which is generally rectangular and used to embed the part to be measured. A pair of top block chucks 532 are provided on the recessed station. The cross-section of the top block chucks is semi-circular, matching the diameter of the first and second pins of the part to be measured, and clamping them on the outside of the first and second pins. Correspondingly, the output end of the threaded cylinder 57 has a top block chuck 533 that matches the cylindrical end face of the part to be measured, clamping it on the cylindrical end face of the part to be measured. When the part to be measured is embedded in the recessed station, the pair of top block chucks on the recessed station clamp the first and second pins respectively; after the threaded cylinder is started, the threaded cylinder will press against the cylindrical end face of the part to be measured through the top block chucks at the output end, tightening and fixing it, as shown. Figure 5 As shown.

[0017] In this embodiment, there are two groove stations: a first groove station and a second groove station arranged side by side. A servo motor is used to move the part to be tested horizontally, which is placed on the workpiece positioning plate. An industrial camera is used to photograph the part to be tested to detect the diameter of the holes of its first and second pins. An infrared scanner is used to detect the flatness of the upper and lower planes of the part to be tested, the workpiece thickness, and the height of the workpiece pins. A workpiece robot is used to arrange the parts to be tested on the workpiece positioning plate and to classify good and bad parts.

[0018] The working process of this utility model is described as follows: 1. The workpiece robot picks up the parts to be tested from the feeding device and places the two parts to be tested in the two grooves of the workpiece positioning plate.

[0019] 2. Driven by a servo motor, the ball screw sub-module moves the part to be tested in the first groove of the workpiece positioning plate horizontally to the lens of the industrial camera, and then completes the imaging of the round holes of the two pins.

[0020] 3. After the two round holes are photographed, the workpiece positioning plate continues to move forward. The upper and lower laser heads of the infrared scanner emit laser beams to perform a moving scan, completing the acquisition of data on the entire workpiece plane, workpiece thickness, and pin height. At this point, the inspection of the part to be tested in the first groove station is completed.

[0021] 4. The workpiece robot picks up the parts to be tested from the first groove station. If they are qualified, they are moved to the laser marking machine for marking. If they are defective, they are placed directly into the defective tray. At the same time, the workpiece positioning plate continues to move forward to test the parts to be tested in the second groove station.

[0022] 5. After the qualified products are coded, the workpiece robot puts the qualified products into the good product tray.

[0023] 6. The workpiece robot then picks up the inspected parts from the second groove station. If they are qualified, they are marked; if they are defective, they are placed in the defective tray. At the same time, the workpiece positioning plate moves back to the initial standby position, and the first round of work is completed.

[0024] This invention involves repeated testing of the parts under test to find a suitable camera and lens. A large number of circular diameter measurement tests were conducted on the machined parts. The diameter of the circular hole is 8.95mm. If a 3-megapixel camera with a resolution of 2048×1536 pixels is used, the system resolution is 8.95 / 1536=0.0058mm. During dynamic testing, the error is 2-3 pixels, and the accuracy is close to 0.02mm.

[0025] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A fully automatic part dimension detection system, characterized in that, It includes a feeding device, a feeding cylinder, a workpiece robot, and a detection unit assembly; the feeding device is located on both sides of the workpiece robot and moves along the guide rail under the drive of the feeding cylinder; the detection unit assembly is located in front of the industrial robot; after the workpiece robot picks up the part to be tested from the feeding device, it places it on the detection unit assembly, and the detection unit assembly performs all-round detection of the size of the part to be tested. The part to be tested has cylindrical end faces at both ends, and a first pin and a second pin in the shape of cylinders are provided on the part to be tested; The detection unit assembly includes a workpiece positioning plate, which has at least one groove station for embedding the part to be tested. A pair of top block chucks are provided on the groove station, each with a semi-circular cross-section matching the diameters of the first and second pins of the part to be tested. The workpiece positioning plate also has a threaded cylinder, the output end of which has a top block chuck matching the cylindrical end face of the part to be tested. When the part to be tested is embedded in the groove station, the pair of top block chucks on the groove station clamp the first and second pins respectively. After the threaded cylinder is activated, it presses against the cylindrical end face of the part to be tested through the top block chuck at its output end.

2. The fully automatic part size detection system according to claim 1, characterized in that, The detection unit assembly also includes an infrared scanner and an industrial camera fixed on the side plate, as well as a ball screw sub-module connected to the workpiece positioning plate, with a servo motor at one end of the ball screw sub-module; Driven by a servo motor, the ball screw assembly moves the workpiece positioning plate horizontally, thereby moving the part to be tested, which is fixed on the workpiece positioning plate, horizontally to the detection area of ​​the industrial camera or infrared scanner.

3. The fully automatic part size detection system according to claim 1, characterized in that, The feeding cylinder is a magnetically coupled rodless cylinder.

4. The fully automatic part dimension detection system according to any one of claims 1-3, characterized in that, The groove station includes a first groove station and a second groove station arranged side by side.

5. The fully automatic part dimension detection system according to any one of claims 1-3, characterized in that, The fully automated parts size inspection system also includes a laser marking machine for marking qualified parts; The workpiece robot picks up the parts to be tested from the groove station after inspection. If the parts are qualified, they are moved to the laser marking machine for marking.

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